Installation of the Engine-Pump Heat-Shield Assembly

TASK 29-11-51-400-807-A
Installation of the Engine-Pump Heat-Shield Assembly

WARNING: WEAR APPLICABLE PERSONAL PROTECTIVE EQUIPMENT (PPE) WHEN YOU DO THIS TASK. BEFORE YOU USE PPE, READ, UNDERSTAND AND OBEY ALL INSTRUCTIONS FOR ITS USE. THESE INSTRUCTIONS INCLUDE INSTRUCTIONS FROM THE MANUFACTURER, YOUR EMPLOYER AND GOVERNMENT REGULATIONS. YOU CAN GET INJURED IF YOU DO NOT USE PPE. GET INSTRUCTIONS FROM YOUR EMPLOYER ON WHICH PPE IS NECESSARY.

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AND THE ADJACENT COMPONENTS AFTER ENGINE SHUTDOWN. THE ENGINE, THE ENGINE OIL AND THE ADJACENT COMPONENTS CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

ZONE: 435

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	COVER - PROTECTION
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 70 and 63 lbf.in (0.79 and 0.71 m.daN )
No specific	Torque wrench: range to between 90 and 81 lbf.in (1.02 and 0.92 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.PU5-0005)	anti-seize compound

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
435	FAN AND ACCESSORY GEARBOX
195BB, 197CB
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 452AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 29-10-00-864-001-A	Depressurize the Green Hydraulic System
TASK 29-11-51-000-805-A	Removal of the Green Engine Driven Pump
TASK 29-11-51-400-805-A	Installation of the Green Engine-Driven Pump
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors
Engine-Pump Heat-Shield Assembly

3. Job Set-up
Subtask 29-11-51-860-082-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the Green hydraulic system is depressurized
(Ref. AMM TASK 29-10-00-864-001)
(2) Make sure that the reservoir of the Green hydraulic system is depressurized
(Ref. AMM TASK 29-14-00-614-001)

Subtask 29-11-51-941-071-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) On AIR COND panel 30VU:

Make sure that the APU BLEED pushbutton switch is released (the ON legend is off).
Make sure that a WARNING NOTICE(S) is in position to tell persons not to operate this pushbutton switch.

(2) Make sure that a WARNING NOTICE(S) is in position to tell persons not to pressurize the Green hydraulic system:

On the HYD section of panel 40VU
On access door 197CB, on the ground-service panel of the Green hydraulic system.

(3) Make sure that a WARNING NOTICE(S) is in position on access door 195BB to tell persons not to pressurize the reservoir of the Green hydraulic system.
(4) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).

Subtask 29-11-51-010-065-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR

Subtask 29-11-51-040-052-A ** ON A/C NOT FOR ALL

D. Deactivation of the Thrust Reverser System for Maintenance

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Make sure that you did the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 29-11-51-010-066-A ** ON A/C NOT FOR ALL

E. Get Access
(1) Make sure that the right thrust-reverser cowl-door is open (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
452AR

Subtask 29-11-51-020-062-A ** ON A/C NOT FOR ALL

F. Make sure that you removed the Engine Driven Hydraulic-Pump (EDP) (Ref. AMM TASK 29-11-51-000-805).

4. Procedure
Subtask 29-11-51-420-069-A ** ON A/C NOT FOR ALL

A. Installation of the Engine Driven Hydraulic-Pump (EDP) Heat Shield Assembly
(1) Removal of the protection covers

CAUTION: REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY TO PREVENT ENGINE DAMAGE.

(a) Make sure that you remove all the necessary COVER - PROTECTION to prevent damage to the engine.
(2) Install the hydraulic EDP heat shield (1).
(a) Install the forward bracket (4) on the hydraulic EDP heat shield (1) with the two bolts (7) and the two washers (6).
(b) Install the aft bracket (5) on the hydraulic EDP heat shield (1) with the two bolts (7) and the two washers (6).
(c) TORQUE the bolts (7) to between 90 and 81 lbf.in (1.02 and 0.92 m.daN )

.
(d) Application of the anti-seize compound

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

1 Apply anti-seize compound (Material No.PU5-0005) to the threads of the bolts (3).
(e) Put the hydraulic EDP heat shield (1), the forward bracket (4) and the aft bracket (5) in position on the accessory gearbox.
(f) Install the forward bracket (4) and the aft bracket (5) on the accessory gearbox. Use the four bolts (3) and the four washers (2).
(g) TORQUE the bolts (3) to between 70 and 63 lbf.in (0.79 and 0.71 m.daN )

5. Close-up
Subtask 29-11-51-420-070-A ** ON A/C NOT FOR ALL

A. Install the Engine Driven Hydraulic-Pump (EDP) (Ref. AMM TASK 29-11-51-400-805).

Subtask 29-11-51-410-063-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Remove the WARNING NOTICE(S).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Close the right thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
452AR

Subtask 29-11-51-440-051-A ** ON A/C NOT FOR ALL

C. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 29-11-51-410-064-A ** ON A/C NOT FOR ALL

D. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(2) Close access door 197CB.

[Rev.10 from 2021] 2026.04.01 00:18:24 UTC